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docs: Add documentation on how to specify shard number for a cluster in "high availibility" doc (Issue #5348) #13258

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crenshaw-dev merged 1 commit into from
Sep 20, 2023
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docs: Add documentation on how to specify shard number for a cluster in "high availibility" doc (Issue #5348) #13258

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3 changes: 2 additions & 1 deletion docs/operator-manual/high_availability.md
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Expand Up @@ -60,7 +60,7 @@ reconciliation. In this case, we advise to use the preferred resource version in
* The controller polls Git every 3m by default. You can change this duration using the `timeout.reconciliation` setting in the `argocd-cm` ConfigMap. The value of `timeout.reconciliation` is a duration string e.g `60s`, `1m`, `1h` or `1d`.

* If the controller is managing too many clusters and uses too much memory then you can shard clusters across multiple
controller replicas. To enable sharding increase the number of replicas in `argocd-application-controller` `StatefulSet`
controller replicas. To enable sharding, increase the number of replicas in `argocd-application-controller` `StatefulSet`
and repeat the number of replicas in the `ARGOCD_CONTROLLER_REPLICAS` environment variable. The strategic merge patch below
demonstrates changes required to configure two controller replicas.

Expand All @@ -79,6 +79,7 @@ spec:
- name: ARGOCD_CONTROLLER_REPLICAS
value: "2"
```
* In order to manually set the cluster's shard number, specify the optional `shard` property when creating a cluster. If not specified, it will be calculated on the fly by the application controller.

* `ARGOCD_ENABLE_GRPC_TIME_HISTOGRAM` - environment variable that enables collecting RPC performance metrics. Enable it if you need to troubleshoot performance issues. Note: This metric is expensive to both query and store!

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